"Snip old blooms, numbskull!" (8)
I believe the answer is:
deadhead
'snip old blooms numbskull' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
This is all the clue.
Can you help me to learn more?
(Other definitions for deadhead that I've seen before include "Remove faded flowers from a plant" , "archetypal hippy" , "Remove finished blooms" , "Treat rambler, perhaps" , "Remove faded blooms from" .)